Lock



May 29, 1923. 11,456,838

H. G. volGHT v Lock Filed July 1v.' 191e INVENTOR w? 41.

BY nw? e. ATTORNEY Patented May 29, 1923.

' UNITED STATES vim'rislxl'r [o1-rica HENRY G. VOIGHT, OF. NEW BRITAIN, CONNECTICUT, ASS/IGNOR LOl SKBQCJrIl'T 85` i COMPANY, NEW `HAVEN, .CONNECTICUT, A CORPORATION OF CON- NECTICUT.

Loox.

`Application filed July 17, 1918. Serial No. 245,383.

To aZZw/zomi may @officer/a:v

Be it known that I, HENRY G. VOIGHT, of New' Britain, county of Hartford, State of Connecticut, have invented lcertain new and useful Improvements in Locks, of which the following is a full, clear, land exact description.l

`This invention relates to locks and more particularly to a pivotally mounted latch bolt provided with key-operated means for swinging the latch bolt from its latched to its unlatched position.

My invention relates particularly7 to the type of key-operated latch which is designed to be mounted upon a sliding vdoor o r lid or the cooperating frame for the same, where it is intended that the door orlid be unlocked only from the outside 4of the same. Such sliding doors or lids are commonly provided upon cabinets, cupboards, boxes and the like which are designed to beun'locked by a key inserted from theoutside.

The principal obj ect of my invention is to provide a key-operated lock with simple but eflicient means for voperating the above mentioned type of latch vto swing its latch bolt, from the locked to the unlocked position.

` Another object ofmy invention is to provide a strong, durable spring-operated latch f whichmay be easily and inexpensively manufactured. i n y v To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the drawing, y v Fig. l is a fragmentary front elevation of a door or lid and the cooperating frame or casing, having. my improvement appliedthereto., the latch being .indicated in dotted lines upon the door .or lid and the -strike plate indicated in dotted lines upon theJ adjacent frame. I

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1", looking in the direction of the arrows g,

Fig. 3 is a fragmentary view of the inside of the door or lid, the latch being removed in order toshow the means by` which the keycontrolled lockv is secured in place; y

Fig. 4 is a plan view of the inner-face of the latch, the key-barrel which operates the latch bolt and the strike platebeing shown in section, and the latch bolt being showninl its locked position; Y

Fig. 5 is a view similar to Fig. 4, showing the latch bolt held in its `retracted by the strike plate; and Fig. 6 is a sideview of the latch bolt removed from its latch casing.

The drawing may be briefly described as disclosing a latch 10 whichis mounted Iupon 'position the inner face of a sliding door or lid 11.n i

This latch is positioned to cooperate with a strike plate 12 which is mounted upon the 'frame 13 for the door or lid 11.- Upon the outer face of this door or lid'is mounted' a key-operated lock 14 which vis provided with means for retracting the'latch bolt inorder that the` dooror lid 11 may be opened. As

yabove stated, the object of my invention is to` improve ,the constructionofthe latch 10 4and the means by Iwhichthekey-controlled lock 14 is operatively connected withv the latch 'bolt to retractfthe same.'l

The casing ofthe `latch l10 consists preferably of a face plate 15, one edge Vof which is bent at a right angle thereto, as at 16, to form the forward edge 'of the lock casing. This face plate is also provided with a plurality of screw holes 17 adapted to receive screws (not shown) for securing the latch casing to the member 11 upon whichit' is mounted. The inner faceand rearedge of this latch casing preferably consist of a plate such as 18 vhaving a marginal portion bent at a right angle thereto as at 18 to form the rear edge'of the lock casing. Thev plate 18 may be secured tof the face plate 15 by screws 'such as 19,' the two plates being held in' their spaced relation by yany pre-- ferred' means. `The forward edge luof. the y lock casing has av slot 20formed therethrough, as indicated in dotted lines in Figs.

4 and 5. This slot'is adapted .to receive jthe outwardly projecting portion of the latch bolt 21` which is pivotally mounted vwithinitsfcasing in a manner which lwill be hereinafter described. Upon the outerend `of this latch bolt is formed a hook such as 22, and upon the inner end of` this bolt, is -formed an, enlarged, substantially circular portionsuch as 23, having a drill .hole 24 formed. therethrough.` Surrounding this drill 'hole' andconcentric therewith is formed a rib or flange-25which extends outwardly from one face of the latch bolt. The latch bolt 21. is further provided with a slot 26Vv extendinglaterally therethrough and communicating with the drill hole 24, as shown particularly in Fig. 6. The means for pivotally mounting the latch bolt within the latch casing consists preferably of a drill hole formed through the plate 18, to provide a bearing in which the annular rib 25 is rotatably mounted, the arrangement being such that the outer periphery of the rib 2'contacts with'ther face of the drill hole formed in the plate 18 andvrotatably supports the latch bolt within the latch casing. The means which I provide for normally holding the latch bolt in its latched position consists preferably of a coiled spring 27, one end of which may be secured to a post such as 28, which is rigidly secured to the lock casing, and the other end of this spring is attached to' the latch bolt in any desired manner. `The attaching means which'I have illustrated consists of forming a notch or socket in one face of the latch bolt byv cutting aw-aythe metal so that the pin 29 is produced, about which the inner end of the spring 27 is looped. The forward movement of the latch bolt, that is the extent to which the latch bolt may be swung towards the pin 28 by the spring 27, is limited by one face ofthe latch bolt striking against an ,end ofv the slot 2O formed in the plate 15, as shownin Figs. 1 and 4. The strike plate 12 is preferably L-shaped in' cross-section and has the configuration shown in Fig. 2. One face of this strike plate has a slot 30 formed therein, positioned to receive the projecting end ofthe latchfbolt 21, and this strike plate may be secured to the door frame 13 by screws such as 31.

. The key-controlled means which I provide for retracting the spring-operated latch bolt 21 consists preferably of a cylinder lock of a welleknown construction pro vided with novel means for connecting the same to the latch bolt.` In the particular form shown the pin tumblerlock 14 has the usual casing 32, face plate or escutcheon 33, key-barrel 34 and pin tumblers 35. The` key-barrel 34 preferably has a circumferential groove formed about the same near its inner end and a blade or plate such as 36 is provided with one edge engaging this groove in a wellfknown manner, in order to prevent theV key-barrel from being withdrawn from its lock casing, the blade being secured to the lock casing by screws 37; Upon the outer face of the e'scutcheon is preferably pivotally mounted, in al wellknown manner, a cover plate' 38. 'Ihe means which I provide Yfor retaining the ylock casing in itsp'ro'perposition within the door or lid 11 consists preferably of a plateV 39 and a pair of s'crew`s'40 which pass through this plate and engage threaded lugs formed upon the lock casingr 32. Thisv plate 39 preferably has an opening 39 formed therethrough, of suiiicient diameter to permit the key-barrelto be insertedthrough this opening, as shown in Fig. 3, the arrangement being such that the inner face of the plate 39 rests upon a shoulder formed within the door` 11, and by tightening the screws 40, the lock may be firmly clamped in place within the door 11. rIhe latch casing 13 and the key-controlled lock are so positioned that the key-barrel 34 lies in axial align ment with the axis of the latch bolt 21 and the inner end of the keylbarrel extends into the drill hole 24 formed in this latch bolt. The means which IY provide for operating the latch bolt 21 when the key-barrel is rotated consists preferably of a pin 41 which is mounted rigidly within the inner end of the key-barrel and projects radially there-` from, as shown in Figs. 3,4 andv 5. This pin is so positionedthatit contacts with one shoulder of the slot 26 formed throughj the latch bolt, the arrangement being such that when the key-barrel is rotated' in a-righthand directionwith respect to Figs, 4 and 5, the latch bolt will be swung aboutv its pivotal mounting so that the notched outer end 22 of this latchbolt will clear the strike plate 12 and permit the'latch 10 to be sepa- I vratedfrom the strike plate 12. In order that the lock 14 will not interfere with the self-locking action of the latch bolt, the notch 26 formed` in` the latch bolt should be sufficiently wide to permit the latch bolt to be rocked about its pivotal mounting`l by the strike plate, as shown in Fig.5, without this rocking movement being interfered with by the pinY 41 which projects from the keybarrel into this notch.

From the above description, when read in connection with the drawing, it willv be apparent that when it isdesired to unlock the door or lid upon which the latch 10 is mounted, all that is necessary is to insert the proper key in the lock 14 and rotate the lkey-barrel,through a short angle ina clockwise direction, so that the pin 41l which con,- tacts with one shoulder of the slot 26 will swing the latchbolt 21 about its pivotal mounting suiliciently to clear the strike plate 12, to permitl the sliding door or lid 11 to be slid away from the frame orrcasingrl). As soon: as the latch bolty has been vdisengaged from its strike plate the key may be released, whereupon the latch bolt and thekey barrel operated thereby through then pin 41 will be immediately returned t-'o the normal protracted position bythe' spring 27. In which position 'the latch boltl is rea-dy to be snapped1 into engagement with its strike plate' in a well-known manner without requiring' the use of a key. Sincefthe key-barrel 34 is normally in itsloCked polatch bolt to be swung by its strike plateias construction orv operation of m shown in Fig'. 5,thatfthe notch'26 be of sufiicie'nt width to prevent the inactive face or shoulder o-f'this" notch from engaging the pin 41.y The inner faceplate 18 ofthe latch casingpreferably 'has ta notch 42 cut therein, which is provided to clear the projecting pin 41 as the inner end ofthe key-barrel in assembling theparts,- isfinse'rted in the drill'hole 24 formed in ther-latch bolt.'-

Although in" 'describing the ,construction and' operation oflmv loclr,`I"have described the latch 10 yand lock'll as mounted yupon the sliding elementy 11 and the strike plate V12 as mounted'upon the fixed element 13, it will be obvious that-..thelat`ch*10'and lock 14 may be mounted upon either the sliding door,or the fixed 'door frame; or the latch 10 may be mounted on one sliding element and the strike plate 12 on another sliding element, without in any way modifying the device, Furthermore, although I have illustrated a pin tumbler lock for retracting the Alatch bolt 21, it will be apparent that any preferred type of lock having a key-operated barrel may be pro-vided with the means herein de scribed for operating the latch bolt 21, without departing from the scope of my invention as defined in the annexed claims:

1. Locking mechanism, comprising a latch casing having a spring operated latch bolt pivotally mounted therein, a cylinder lock having a key-barrel rotatable therein, Said key-barrel provided with a projection extending therefrom into operative engagement with said latch bolt to retract the same, the engagement between said projection and latch bolt constructed to permit said latch bolt to be swung about its pivotal mounting without rotating said key-barrel.

2. Locking mechanism, comprising a latch casing provided with a pivoted spring operated latch bolt, a `cylinder lock for retracting said latch bolt, said lock having a key-barrel rotatable therein, a projection upon said key-barrel, and a shoulder upon said latch bolt. said projection positioned to be moved by its key-barrel into and out of operating engagement with said shoulder.

3. Locking mechanism, comprising a latch casing having a spring-operated latch bolt pivotally mounted therein, a cylinder lock, a key-barrel rotatable therein, said latch bolt and key-barrel mounted in axial alignment, and means for operatively connecting said. key-barrel to said latch bolt including a proj ection and cooperating shoulder constructed to form a lost motion connection between said key-barrel and latch bolt.

4. Locking mechanism, comprising a latch casing, a spring-operatedlatch bolt pivotally mounted'therein, a strike plate positioned to v have said latch bolt automatically swung into locking engagement therewith, a cylinder lock provided .withra key-barrel, said keybarrel positioned to extend into said casing, and -means u'pon `said 1 key-barrel tol retract saidlatch bolt upon the rotation of saidkey-` barrel.

5.1 Locking mechanism, comprising alatch casing, a cylinder lock, a key-barrel lrotatably mounted in'saidlock, a latch bolt pivotally mounted within said vlatch case, said,l keybarrel and latch boltbeing mounted in axial alignment, and means upon said key-barrel for operatively engaging said latch bolt, said'means being constructed to'permit said latch bolt to be swungfrom its latched to its unlatched position while said key-barrel is inits locked position. y t 6; Booking ?mechanismcomprising a pivoted'spring-operated latch bolt, a strike plate positioned to have Said latch bolt swung into locking engagement therewith, a cylinder lock having a key-barrel therein, said keybarrel positioned to -lie in axial alignment with the pivot of said latch bolt, and means forming a lost motion connection between f said latch bolt and key-barrel to operate the former by the rotation of said key-barrel.

7. In combination with a key-operatedl lock, a latch casing having a bearing com- Y prising a hole formed in one face thereof, a spring operated latch bolt within said case, an annular rib formed upon one face of said bolt, said rib and bearing forming a pivotal mounting for said bolt, said bolt having a.

notch formed therein cuttingssxaid rib, and i l means upon said key-operated lock operatively engaging-said notch.

8. In 'combination with a key-operated lock, a latch casing, a latch bolt provided with means for pivotally securing the same within said casing, said bol-t having a clearance openv ing formed axially therethrough within said pivotal means, said bolt also having-a f shoulder positioned adjacent said opening, and means upon said key-operated lock extending into said opening-and operatively engaging said shoulder. j

- 9. In combination with a door or the like,

a latch casing mounted within one face there-v of, a latch bolt vswingingly mounted within said casing, a cylinder lock mounted within lthe opposite face of said door or the like, a

key-barrel therein extending through 'said door into close proximity to said latch bolt,`

and a lost motion connection between said key-barrel and'latch bolt for operating the latter by means of said key-barrel.

10. In combination, a latch casing, a latch bolt swingingly mounted therein, said latch bolt having a relatively ,large opening formed vtherethrough concentric with the axis about which the bolt swings, means indemounting.

pendentV of said opening for sxvingingly mounting'said bolt Within its casing, and a cylinder lock for operating said latch bolt', said lock having a key barrel extendingv into said openir'igv and operatively' connected to said'latch-bolt.

.11;- In combination, a latch casing, a latch bolt provided with pivotal means cooperating With said casing to swingingly mount the same therein, said bolt'hayinga clearance opening formed therein, and a cylinder lock, said lock having a key-barrel extending into said opening and operatively connected to said bolt to swing the same upon its `pivotal 12. In combination, a latch casing, a spring-operated latch bolt pivotally mounted therein, a strike plate positioned to have sai'dlatch'- bolt swung into locking` engagement therewith, anda? cylinder loel; pro'- vided With a key-barrel operatively engaging said latch bolt, said engagement between said key-barrel and latch bolt constructed to'forin a lost motion connection to permit swinging of saidV latch bolt by said strike plate While said key-barrel is locked against rotation.

13. In` a lock, a casing, a latch,y pivotally mounted thereon and provided with an opening concentricwith the pivot'and a key operated rotatable member extending through the casing and into said opening, cooperating means upon said latch and key operated member, by means of which the former is controlled by the latter, ,said means being constructed to permit said latch tobe swung from itslatch toits unlatched position,rwhle saidkey operated member is in locked posi tion.

In Witness.v whereof, I have hereunto s et my hand on the'lth day of July, 1918.

HENRY of. voIGHT. 

